| Cite this article: | 白晨阳,姜浩,苏庆旺,等.吉林省中部地区旱作条件下不同水稻品种对播期的响应特征[J].灌溉排水学报,0,():-. |
| baichenyang,jianghao,suqingwang,et al.吉林省中部地区旱作条件下不同水稻品种对播期的响应特征[J].灌溉排水学报,0,():-. |
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| Response of Three Varieties of Rice to Sowing Dates Under Dry Cultivation in Middle Areas of Jilin Province |
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baichenyang1, jianghao1, suqingwang1, liyunzhe1, weixiaoshuang1, cuijingjing2, yangmeiying3, wangdongchao4, wuzhihai2
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1.College of Agriculture, Jilin Agricultural University;2.College of Agriculture, Jilin Agricultural University、National Crop Variety Examination and Appraisal Station;3.College of Life Science, Jilin Agricultural University;4.Changchun Jinong University Agricultural Technology Co.
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| Abstract: |
| Abstract 【Objective】To study the effects of sowing date and variety type on rice yield, growth period and agronomic traits of rice under dry cultivation condition, and to provide a scientific basis for selecting suitable sowing dates for different varieties.【Methods】In this research we took early maturity japonica, middle maturity japonica and late maturity japonica as experimental materials and set up five sowing dates on April 25, April 30, May 5, May 10, May 15, respectively, which to study the?characteristics of yield, growth and agronomic traits of different rice varieties under dry cultivation condition.【Results】The rice in dry cultivation yields of the three varieties were manifested included: early maturing japonica rice> late maturing japonica rice> medium maturing japonica rice. The results showed that the leaf area and chlorophyll content could be increased by 7.6% and 13.5% by selecting proper sowing dates. Dry matter accumulation of three types of rice showed a trend of first decreasing and then increasing with the delay of sowing date, and the plant height of early maturing japonica rice also showed the same trend. proper sowing dates was beneficial to grain filling, and sowing at different stages had a little effect on the seed setting rate and?thousand grain weight of rice under dry cultivation condition, but it had a large effect on spike number and grain number, The coefficient of variation of the number of spike number reached 20.9%, and the coefficient of variation of the number of grain number reached 23.7%. 【Conclusion】Early maturing japonica rice in dry cultivation optimal sowing dates ranged from May 10 to May 15,and late maturing japonica rice and medium maturing japonica rice optimal sowing dates ranged from April 30 to May 5 in central region of jilin province, that?increased the yield . |
| Key words: dry cultivation of rice; sowing dates; variety type; agronomic characters |
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